Methane (CH4) is produced in many natural systems that are vulnerable to change under a
warming climate, yet current CH4 budgets, as well as future shifts in CH4 emissions, have …

The problem concerning the greenhouse effects of human activities has broadened in scope
from the CO2‐climate problem to the trace gas‐climate problem. The climate effects of non …

IN the past few years, many workers have noted that the combined effect on climate of
increases in the concentrations of a large number of trace gases could rival or even exceed …

Methane is the most abundant organic chemical in Earth's atmosphere, and its concentration
is increasing with time, as a variety of independent measurements have shown …

A common view is that the current global warming rate will continue or accelerate. But we
argue that rapid warming in recent decades has been driven mainly by non-CO2 …

The principal oxidants in the lower atmosphere are ozone (O3) and two by-products of
O3photodissociation, the hydroxyl radical (OH) and hydrogen peroxide (H2O2). A number of …

Emission rates of CH4 from four Japanese paddy fields were measured throughout the
cultivation period in 1988 by using the closed chamber method. Large seasonal variations of …

A global climatological distribution of tropospheric OH is computed using observed
distributions of O3, H2O, NOt (NO2+ NO+ 2N2O5+ NO3+ HNO2+ HNO4), CO, hydrocarbons …

Previous studies on ice core analyses and recent in situ measurements have shown that
CH4 has increased from about 0.75–1.73 μmol/mol during the past 150 years. Here, we …

As part of an effort to assess the potential impacts associated with global climate change, the
US Environmental Protection Agency's Office of Research and Development is supporting …